Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7146366 | Sensors and Actuators B: Chemical | 2015 | 6 Pages |
Abstract
Optical temperature sensors play a vital role in biomedical and therapeutic applications due to their reliable and unique detection sensitivity. Internal self-heating in Er3+/Yb3+ doped yttrium vanadate particles is observed on optical excitation at 980 nm wavelength of a diode laser. Temperature sensing performance is investigated by exploiting the temperature dependent fluorescence intensity ratio (FIR) of two emission bands (2H11/2/4S3/2 â 4I15/2) of Er3+ ion. The calculated sensor sensitivity, 0.01169 Kâ1 at 380 K, is found highest among the reported results for inorganic nanosensors. The temperature of the nanocrystalline sample particles is found to increase by a large value (315-460 K) within a short interval of excitation pump power (13.18-50.45 W cmâ2). This achievement suggests potential use of the present material as an optical nanoheater for hyper-thermal treatment.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Manoj Kumar Mahata, Kaushal Kumar, Vineet Kr. Rai,